Data:L10a12/HOMFLYPT Polynomial

Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle a^7 z^{-1} -3 z a^5-a^5 z^{-1} +3 z^3 a^3+z a^3-a^3 z^{-1} -z^5 a+z a+2 a z^{-1} +2 z^3 a^{-1} - a^{-1} z^{-1} -z a^{-3} }